//771. 宝石与石头

int numJewelsInStones(char * jewels, char * stones){
    int count = 0;
    for(int i = 0; i < strlen(jewels); i++)
    {
        for(int j = 0; j < strlen(stones); j++)
        {
            if(jewels[i] == stones[j])
                count++;
        }
    }
    return count;
}